Christmas sends mobile marketing costs to a record, Fiksu says

Fiksu, a company that helps developers find the most cost-effective ways to acquire users, says marketing costs rose to a record in December as companies spent aggressively to lock-up the top of the charts.

The cost to acquire a loyal user (or one that opens an app three times) rose to $1.81, up 26.5 percent from the previous month. The top 200 free iPhone apps also saw an average of 6.04